Launching rF2 from Steam or direct initiates the Steam on-line (Synchronizer) Background Message Box and changes Button Status from Play to Stop for just under 5 seconds, than returns to play. After a few tries went into Steam Beta Select to step back to "stable" version. Ran the previous version for a session just fine. Returned to Steam Beta Select to step forward to V1128. Ran the Integrity Check. No issues. Back versioned, ran a session, than reverted to 1128. Still dead. Not sure where to look for core dumps anymore, scanned through several folders, nothing revealing.